One of the most constructive things written on this issue is the statement from the Alumni for Responsible Speechhttp://www.connexions.org/SafeLearning.htm
which states that “we believe that universities, as public institutions, have a duty to ensure a safe learning environment for students and faculty, and to take corrective action when free speech or academic freedom are misused in an irresponsible way.”
Their statement sets out concrete steps that can and should be taken to ensure a safe learning environment.